diff --git a/ChangeLog b/ChangeLog
index f8129ae7f..df311cf07 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-01-18  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	Add license header to spkmodem-recv.c.
+
 2013-01-17  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Rewrite spkmodem to use PIT for timing. Double the speed.
diff --git a/util/spkmodem-recv.c b/util/spkmodem-recv.c
index 4cc88b83a..9075f9ad5 100644
--- a/util/spkmodem-recv.c
+++ b/util/spkmodem-recv.c
@@ -1,3 +1,21 @@
+/* spkmodem-recv.c - decode spkmodem signals */
+/*
+ *  Copyright (C) 2013  Free Software Foundation, Inc.
+ *
+ *  spkmodem-recv is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  spkmodem-recv is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with spkmodem-recv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>